Dafny for Reliable Software: Practical Specification, Proof, and Program Design

By William M. Jackson

**Dafny for Reliable Software: Practical Specification, Proof, and Program Design** introduces Dafny as a practical language and verification system for building dependable software. The book explains why formal methods matter, especially when testing alone cannot provide enough assurance, and shows how Dafny combines programming, specification, and automated proof in one coherent environment. Readers are guided through the foundations of the language, including modules, types, expressions, and the logical ideas behind verification, such as Hoare logic and SMT-based reasoning.

From there, the book develops a disciplined approach to writing correct programs. It explains how to express intent with preconditions, postconditions, loop invariants, and quantified assertions; how to structure proofs so they remain modular and maintainable; and how to design algorithms and data structures with verification in mind. Special attention is given to object-oriented programming, including classes, dynamic allocation, class invariants, and ownership-style reasoning, with practical techniques for managing complexity in larger verified systems.

The final sections connect Dafny to real-world software engineering. They explore how verification fits into development workflows, how to balance precision with readability and performance, and how Dafny can support trustworthy implementations in larger projects and research settings. Throughout, the book emphasizes practical specification and program design, helping readers not only prove correctness, but also write software that is clear, robust, and reliable by construction.

• Format: Paperback
• Language: English
• ISBN: B0HMQDHS4Z
• ISBN13: 9798161487754
• Release Date: October 2026
• Publisher: Independently Published
• Length: 232 Pages
• Weight: 0.70 lbs.
• Dimensions: 0.5" x 6.0" x 9.0"